Fix dependencies

[krisorr]

We have compile time dependencies in the buy/build.gradle file that should be moved to the sample application to reduce the number of transitive dependencies we have introduce to users.

compile 'com.android.support:design:23.4.0'
compile 'com.android.support:support-v4:23.4.0'
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.android.support:palette-v7:23.4.0'
compile 'com.android.support:customtabs:23.4.0'

Are all candidates for moving to our sample app build.gradle.

[krisorr]

The PR was a bit aggressive on the refactor, we will be rolling some of it back.